Window inserts



@9,1956 T. R. THOMAS y 2,76%@

WINDOW INSERTS Filed March 22, 195] INVENTOR 7%74 s E. #fe/w16 M' ff@ ATTORNEY 2,765,651 Patented Uct. 9, 1956 WINDOW INSERTS Thomas R. Thomas, New York, N. Y., assigner to Auto Research Corporation, a corporation of Delaware Application March 22, 1951, Serial No. 216,989

1 Claim. (Cl. 73-334) The present invention rel-ates to window insert constructions |and it particularly relates -to oil window constructions which may be conveniently positioned in the side of a lubricating reservoir.

Although not specifically limited thereto, the present invention will be particularly described in its application to reservoirs carrying reciprocating pistons or other types `of pumps for feeding small amounts of lubricant either continuously or intermittently to a branch distributing system having high restriction iiow metering outlets.

It is among the objects of the present invention t-o provide a novel oil window assembly or window insert assembly which may be manufactured or purchased in the form of a unitary assembly, and such assembly may be readily inserted into an opening or recess in the wall of a reservoir.

Another object is to provide a unitary oil window or window insert assembly which may be readily employed for utilization with lubricant-containing recesses or reservoirs to indicate the level of lubricant therein and which, upon installation, will require a minimum of handling and work by the workman or customer who makes the assembly.

Still further objects and advantages will |appear in the more detailed description set forth below, it being understood, however, that this more detailed description is given by way of illustration and explanation only and not by way of limitation, since various changes therein may be made by those skilled in the lart without ydeparting from the scope and spirit of the present invention.

In accomplishing the above objects, it 'has been found most suitable, according to one embodiment -of the present invention, to provide a sheet metal, annular channel-like enclosure which will hold a transparent disk, which may be of a plastic or even of glass, |and a gasket to assure oil tightness.

Desirably, the enclosure has a metal backing forming a complete closure for the back of the window with cutouts permitting iiow of lubricant from above and below into the body of or from the body of the reservoir.

Desi-rably, the periphery of the channel member which receives the transparent ldisk and the gasket may have a groove which receives an oil-proofing material when the assembly is inserted into the side of the reservoir.

An important feature of the present invention resides in the fact that the entire assembly unit consists of a sheet metal channel with back and gasket and window which may be sold as a unit and readily inserted into a reservoir, with assurance of loil tightness.

With the foregoing and other objects in View, the invention consists of the novel construction, combination and arrangement of parts 'as hereinafter more Ispecifically described, and illustrated in the accompanying drawings, wherein is shown an embodiment of the invention, but it is Ito be understood that changes, variations and modifications can be resorted to which fall within the scope of the claim hereunto appended.

In the drawings wherein like reference characters denote corresponding parts throughout the several views:

Fig. 1 is a side sectional View of one form of oil reservoir according to the present invention, showing the oil window or oil gauge assembly in position in the side of the reservoir.

Fig. 2 is an exploded rear view in perspective of the separated metal channel and backing member, the gasket and the 4oil window upon van enlarged scale as compared to Fig. 1.

Fig. 3 is an end elevational view ltaken upon the line 3 3 of Fig. 1, upon an enlarged scale Ias compared to Fig. 1.

Fig. 4 is a fragmentary perspective vertical sectional view taken upon the line 4 4 of Fig. `3 and upon an enlarged scale as compared to Fig. 3.

Referring lto Fig. l, there is shown a reservoir A having a cover B with a pump C having a window unit D, to which this invention is particularly directed.

The reservoir A is merely typical and may take -a large number of other forms in shapes and designs and may even consist of a part -of or a pocket in the mechanism to be lubricated.

As shown, the reservoir A has the base 10 with Ithe bosses 11. The bosses 11 are tapped to permit the reservoir A to be mounted upon a part of the machine or mechanism to be lubricated.

The reservoir has the side Wall 12 and a rear wall 13, which may be part of the same casting.

The cover B is connected by bolts, not shown, to the reservoir A and a gasket 14 forming a lubricant-tight connection.

The cover B h-as a base 1S with the depending edge portion v16 to contact the gasket 14. It also has a dome 17 with the cover 18.

rThe cover has the filling cup 19 with the spring-closed cover 20, which is hinged at 21.

The side wall 22 forms a bearing for the horizont-al pivot rod 23.

On the exterior of the dom 17 the pivot rod carries the handle 24. On the interior of the dome 17 is positioned the lever 25. The lever 2-5 has Ia loop 26 tting on the rod 23 and it has the semi-circular jaws 27 at its other end. The spring 29 will normally press the lever downwardly, as indicated by the arrow 30. The rounded jaws 27 of the lever 2S rest below the cap 31 `and above the shoulder 32 lat the top of the piston of the pump C.

The pump C has an inlet lter 33 and |an outlet connection 34 which leaves the branch distributing system with the high restriction outlets, n-ot shown.

Referring -to the wall 5t) of the reservoir, there is provided therein an opening 51 which is designed to iit the window assembly D and permit inspection of the oil in the reservoir A.

Referring to Figs. 2, 3 and 4, the oil window assembly is provided with a casing member E, a gasket member F anda window member G.

The window member G may be of synthetic oilresistant plastic of a transparent nature, such as a molded vinyl resin plate.

The gasket may be of an oil-resistant, resilient material.

The casing E consists of a cylindrical member 52 having a slight hollow 53, receiving a sealing compound with an in-turned shoulder 54.

The rear of the window assembly D has a back chamber 55 enclosed by the cup 56. The cup 56 has the rear wall S7 and the peripheral wall 58.

At the top and bottom of the cup are cut the openings 59 and 6i). T-hese openings are cut so that they Will extend on both sides of the corners 61. 'It will be noted that the bottom portion y63 of the opening extends substantially to the shoulder S4 so that there will be no re- (i) tention of oil in `the chamber 55, thus `avoiding any -tendency for a false reading on account of capillary action.

Normally the gasket F and the Window G will be placed in the receptacle member E against t-he shoulder 54. Then the edge 64 will be turned in to press against the window G at 65. This will form an oil-tight connection.

The structure las shown -in Figs` 2 to 4 enables itself to large mass scale production and permits the window assembly D to be sold as a unit.

If desired, the back cup 56 may be omitted but desirably a cup V56 is provided `so that there will be suitable reading against the back plate 57 thereof through the window G.

In respect to the hollow portion 53 in ythe outer `cylinder 53, these cups are normally drawn as a straight cylinder and advantage lis taken of the fact Vthat during the rolling over operation to close the Window there will be a slight .deformation given Ithe hollow portion 53.

The entire surfaces 52-53 is then covered wi-th a sealing compound before pressing the unit into place in the port hole in the side ofthe reservoir A.

It is to be understood 'that these window units as shown in Figs. l to 4 may be used in other connections than lubricant reservoirs and they generally serve as a dusttight window for inspection purposes, to observe the operation of a mechanism or to enable observation of the flow or quantity of liquid available.

While there has been herein described a preferred form of the invention, it should be understood that the Isame may be altered in details and in rela-tive arrangement of parts within the scope of the appended claim.

Having now particularly described and ascertained the nature of the invention, and in what manner the s-ame is to be performed, what is claimed is:

A unitary window assembly for insertion into a circular opening in a reservoir, said assembly including a casing having a cylindrical member, `an lannular gasket and a window, said gasket and Window lbeing adapted to'be located inside said cylindrical member, said casing comprising a back chamber forming a cup of reduced diameter, constituting an extension extending into said reservoir, said cup comprising a rear wall and a cylindrical peripheral wall, said rear wall and peripheral wall having at the juncture thereof diametrically opposite top and bottom flow openings extending partly yinto said rear wall and partly into said peripheral wall, said cup being formed with a rim portion constituting a shoulder against which said gasket and Window are mounted,

Gelatt Jan, 8, 1918 Kocher Oct, 19, 1943 

